Fix TFFA from crashing when a player leaves during the intro sequence (…

…#434)

* Fix TFFA from crashing when a player leaves during the intro sequence
* Fix Formatting

Northstar.Custom/mod/scripts/vscripts/gamemodes/_gamemode_tffa.gnut

@@ -63,6 +63,9 @@ void function PlayerWatchesTFFAIntroIntermissionCam( entity player )
 
 	wait TFFAIntroLength
 
+	if ( !IsValid( player ) ) // if player leaves during the intro sequence
+		return
+
 	RespawnAsTitan( player, false )
 	TryGameModeAnnouncement( player )
 }
@@ -75,4 +78,4 @@ void function AddTeamScoreForPlayerKilled( entity victim, entity attacker, var d
 		// why isn't this PGS_SCORE? odd game
 		attacker.AddToPlayerGameStat( PGS_ASSAULT_SCORE, 1 )
 	}
-}
+}